【摘要】 <正> 激光气相法是制备超微粉末的新方法之一,目前还存在超微粉末粒径太小难于收集,原料SiH₄价格较昂贵等困难。我们以SiH₄为主要原料,成功地合成出超微Si、Si₃N₄、SiC粉末,研究了反应条件对超微粉性能的影响,探索了用廉价原料代替SiH₄的可能性,并且在超微粉的收集方面做了若干探索,取得了一些有意义的结果。更多还原

【Abstract】 In the present paper, the principles and devices for producting ultrafine powders by laser induced vapor-phase reaction method is presented. The ultrafine powders of Si, Si₃N₄ and SiC is successfully prepared with a 150W CW CO₂ laser as light source and SiH₄ as main raw- material. The influence of experimental conditions on properties of ultrafine powders is investigated. The pooossibility of substitution of cheaper materjals for SiH₄ is also discussed. This study is expected to mave a good prospects in industrial applications.更多还原